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| author |   Thierry Reding <treding@nvidia.com> | 2014-11-04 14:59:14 +0100 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2014-11-13 13:55:24 +0100 |
| commit | 02acb76d72b3672330b6a20d2773048658b2d176 (patch) | |
| tree | 3b94b9085c953ed129df66529f8355eb7f7bc8b4 | |
| parent | drm/panel: s6e8aa0: Fix build warnings on 64-bit (diff) | |
| download | wireguard-linux-02acb76d72b3672330b6a20d2773048658b2d176.tar.xz wireguard-linux-02acb76d72b3672330b6a20d2773048658b2d176.zip | |
drm/dsi: Introduce packet format helpers
Add two helpers, mipi_dsi_packet_format_is_{short,long}(), that help in
determining the format of a packet.
Signed-off-by: Thierry Reding <treding@nvidia.com>
| -rw-r--r-- | drivers/gpu/drm/drm_mipi_dsi.c | 67 | ||||
| -rw-r--r-- | include/drm/drm_mipi_dsi.h | 3 |
2 files changed, 70 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index eb6dfe52cab2..adf056677498 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -199,6 +199,73 @@ int mipi_dsi_detach(struct mipi_dsi_device *dsi) EXPORT_SYMBOL(mipi_dsi_detach); /** + * mipi_dsi_packet_format_is_short - check if a packet is of the short format + * @type: MIPI DSI data type of the packet + * + * Return: true if the packet for the given data type is a short packet, false + * otherwise. + */ +bool mipi_dsi_packet_format_is_short(u8 type) +{ + switch (type) { + case MIPI_DSI_V_SYNC_START: + case MIPI_DSI_V_SYNC_END: + case MIPI_DSI_H_SYNC_START: + case MIPI_DSI_H_SYNC_END: + case MIPI_DSI_END_OF_TRANSMISSION: + case MIPI_DSI_COLOR_MODE_OFF: + case MIPI_DSI_COLOR_MODE_ON: + case MIPI_DSI_SHUTDOWN_PERIPHERAL: + case MIPI_DSI_TURN_ON_PERIPHERAL: + case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM: + case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM: + case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM: + case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM: + case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM: + case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM: + case MIPI_DSI_DCS_SHORT_WRITE: + case MIPI_DSI_DCS_SHORT_WRITE_PARAM: + case MIPI_DSI_DCS_READ: + case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE: + return true; + } + + return false; +} +EXPORT_SYMBOL(mipi_dsi_packet_format_is_short); + +/** + * mipi_dsi_packet_format_is_long - check if a packet is of the long format + * @type: MIPI DSI data type of the packet + * + * Return: true if the packet for the given data type is a long packet, false + * otherwise. + */ +bool mipi_dsi_packet_format_is_long(u8 type) +{ + switch (type) { + case MIPI_DSI_NULL_PACKET: + case MIPI_DSI_BLANKING_PACKET: + case MIPI_DSI_GENERIC_LONG_WRITE: + case MIPI_DSI_DCS_LONG_WRITE: + case MIPI_DSI_LOOSELY_PACKED_PIXEL_STREAM_YCBCR20: + case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR24: + case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR16: + case MIPI_DSI_PACKED_PIXEL_STREAM_30: + case MIPI_DSI_PACKED_PIXEL_STREAM_36: + case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR12: + case MIPI_DSI_PACKED_PIXEL_STREAM_16: + case MIPI_DSI_PACKED_PIXEL_STREAM_18: + case MIPI_DSI_PIXEL_STREAM_3BYTE_18: + case MIPI_DSI_PACKED_PIXEL_STREAM_24: + return true; + } + + return false; +} +EXPORT_SYMBOL(mipi_dsi_packet_format_is_long); + +/** * mipi_dsi_dcs_write - send DCS write command * @dsi: DSI device * @data: pointer to the command followed by parameters diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 8569dc5a1026..f1a07e302559 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -43,6 +43,9 @@ struct mipi_dsi_msg { void *rx_buf; }; +bool mipi_dsi_packet_format_is_short(u8 type); +bool mipi_dsi_packet_format_is_long(u8 type); + /** * struct mipi_dsi_host_ops - DSI bus operations * @attach: attach DSI device to DSI host |